#643E06
Closest named color: Mud Brown (#60460F). oklch(40% 0.083 69.3), rgb(100, 62, 6).
Aa
White text reads best on this color (9.40:1).
About this color
#643E06 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.083 and its hue 69°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.022 away. White text reads best on it, at 9.40:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.083) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #643E06 |
| RGB | rgb(100, 62, 6) |
| HSL | hsl(36, 89%, 21%) |
| OKLCH | oklch(40% 0.083 69.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #643E06 | 9.40:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #643E06 | 2.23:1 | Fails | Lc 12.5 | Not readable |
| #643E06 text on white | 9.40:1 | AAA | Lc 91.5 | Preferred for body text |
| #643E06 text on black | 2.23:1 | Fails | Lc -10.9 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F9F5F0
oklch(97.2% 0.008 73.7)
-
Step 100
100
#F2E8DD
oklch(93.6% 0.018 70.2)
-
Step 200
200
#E9D6C1
oklch(88.6% 0.035 70.1)
-
Step 300
300
#DCBA95
oklch(80.9% 0.063 69.1)
-
Step 400
400
#C99558
oklch(70.7% 0.1 69.4)
-
Step 500
500
#BA791D
oklch(63% 0.128 69.3)
-
Step 600
600
#A06400
oklch(55.6% 0.121 69.2)
-
Step 700
700
#875400
oklch(49.2% 0.107 69.6)
-
Step 800
800
#6F4400
oklch(42.7% 0.093 69.4)
-
Step 900
900 (this color)
#643E06
oklch(40% 0.083 69.3)
-
Step 950
950
#372105
oklch(27% 0.053 68.7)
#643E06 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4B4100 | 0.049 |
| Deuteranopia (no green cones) | #544A08 | 0.044 |
| Tritanopia (no blue cones) | #6E3534 | 0.066 |
| Achromatopsia (no color) | #464646 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643E06
#643E06
oklch(40% 0.083 69.3)
- #1F4A72
#1F4A72
oklch(39.9% 0.083 249.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #643E06, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.022
- Green Brown #544E03 ΔE 0.054
- Chestnut #742802 ΔE 0.058
- Olive Brown #645403 ΔE 0.064
- Purple Brown #673A3F ΔE 0.072
- Milk Chocolate #7F4E1E ΔE 0.073
- Medium Brown #7F5112 ΔE 0.077
- Rust Brown #8B3103 ΔE 0.081
Use #643E06 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.